Table 1. Sociodemographic and clinical characteristics of the weighted study sample.
| Variable | Category | People with valid serum creatinine and cystatin c value | |
|---|---|---|---|
| Number | (%) in category | ||
| All | Aged 16+ | 5799 | (100%) |
| Age | Age 16–34 | 1756 | (30.3%) |
| Age 34–54 | 2037 | (35.2%) | |
| Age 55–64 | 856 | (14.8%) | |
| Age 65–74 | 615 | (10.6%) | |
| Age 75+ | 522 | (9.0%) | |
| Ethnicity | White | 5244 | (90.7%) |
| South Asian | 243 | (4.2%) | |
| Black | 154 | (2.7%) | |
| Other | 139 | (2.4%) | |
| Sex | Male | 2823 | (48.8%) |
| Female | 2963 | (51.2%) | |
| Occupation (NS-SEC) | High | 1894 | (33.1%) |
| Middle | 1203 | (21.0%) | |
| Low | 2619 | (45.8%) | |
| Qualification | Degree | 1295 | (22.4%) |
| Below degree | 3296 | (57.0%) | |
| None | 1197 | (20.6%) | |
| IMD quintile (1 = least deprived, 5 = most deprived) | 1. (IMD 0.37–8.32) | 1197 | (20.7%) |
| 2. (IMD 8.32–13.75) | 1204 | (20.8%) | |
| 3. (IMD 13.75–21.22) | 1228 | (21.2%) | |
| 4. (IMD 21.22–34.42) | 1105 | (19.1%) | |
| 5. (IMD 34.42–85.46) | 1051 | (18.2%) | |
| Smoking | Never | 3126 | (54.2%) |
| Ex | 1429 | (24.8%) | |
| Current | 1210 | (21.0%) | |
| Body mass index (BMI) (kg/m2) | Mean ±SD | 27.14 | ±5.06 |
| BMI categories | Normal | 1956 | (36.8%) |
| Overweight | 2047 | (38.5%) | |
| Obese | 1314 | (24.7%) | |
| Waist circumference (cm) | Mean ±SD | 92.92 | ±14.01 |
| Waist circumference categories | Low | 2120 | (37.1%) |
| High | 1347 | (23.6%) | |
| Very High | 2242 | (39.3%) | |
| Total cholesterol (mmol/L) | Mean ±SD | 5.30 | ±1.44 |
| Total cholesterol categories | < 5mmol/L | 2675 | (46.2%) |
| ≥ 5mmol/L | 3110 | (53.8%) | |
| HDL cholesterol (mmol/L) | Mean ±SD | 1.48 | ±0.43 |
| HDL cholesterol categories | < 1.2mmol/l | 1301 | (22.5%) |
| ≥ 1.2mmol | 4485 | (77.5%) | |
| Albuminuria | None | 4837 | (92.0%) |
| Micro | 399 | (7.6%) | |
| Macro | 22 | (0.4%) | |
| Diabetes | No diabetes | 5370 | (92.6%) |
| Doctor diagnosed a | 305 | (5.3%) | |
| Survey defined b | 316 | (5.5%) | |
| Total c | 429 | (7.4%) | |
| Hypertension | No hypertension | 3800 | (65.5%) |
| Doctor diagnosed a | 1387 | (23.9%) | |
| Survey defined d | 1542 | (26.6%) | |
| Total c | 1980 | (34.1%) | |
Figures are number (%) unless stated otherwise
a Self-reported doctor diagnosis
b HBA1c ≥6.5%
cDoctor or survey diagnosed
d Identified as high blood pressure (BP systolic ≥140mmHg and/or diastolic ≥90mmHg and/or taking medication for hypertension)
NS-SEC: National Statistics Socioeconomic Classification
IMD: Index of Multiple Deprivation
BMI: Body Mass Index
HDL: High Density Lipoprotein.